Search engine spiders only have a certain amount of data storage, so if you’re performing shady tactics or trying to trick them, chances are you’re going to hurt yourself in the long run. Items the search engines don’t want are:

Keyword Stuffing: Overuse of keywords on your pages.
Purchased Links: Buying links will get you nowhere when it comes to SEO, so be warned.
Poor User Experience: Make it easy for the user to get around. Too many ads and making it too difficult for people to find content they’re looking for will only increase your bounce rate. If you know your bounce rate it will help determine other information about your site. For example, if it’s 80 percent or higher and you have content on your website, chances are something is wrong.